<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            width: 1226px;
            height: 615px;
            background-color: green;
            margin: 0 auto;
        }
        .left{
            float: left;
            width: 234px;
            height: 615px;
            background-color: purple;
        }
        .right{
            float: left;
            width: 992px;
            height: 615px;
            background-color: green;
        }
        .son{
            float: left;
            width: 234px;
            height: 300px;
            margin-left: 13px;
            margin-bottom: 13px;
            background-color: #228dea;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="left"></div>
        <div class="right">
            <div class="son"></div>
            <div class="son"></div>
            <div class="son"></div>
            <div class="son"></div>
            <div class="son"></div>
            <div class="son"></div>
            <div class="son"></div>
            <div class="son"></div>
        </div>
    </div>

</body>
</html>